Carton sealing machine



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CARTON SEALING MACHINE Filed Aug. 15, 1934 18 Sheets-Sheet 5 `lian. 8, 1935. c. H. wlLD 1,987,500

CARTON SEALING MACHINE Filed Aug. 15, 1934 18 Sheets-Sheet 4 Jan. 8, 1935. c. H. wn D CARTON SEALING MACHINE Filed Aug. 15, -19:54 1B Sheets-Sheet 5 Jan. 8, 1935. c. H. WILD 1,987,500

CARTON SEALING MACHINE Filed Aug. 15, 1934 18 Sheets-Sheet 6 'I -LWMM LlruM IL j @Q Jan; s, 1935. c. H. WILD 1,987,500

CARTON SEALING MACHINE Filed Aug. l5, 1934 18 Sheets-Sheet 7 Jan. 8, 1935.

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CARTON SEALING MACHI NE Filed Aug. 15, 1934 18 Sheets-Sheet l2 @@"wmu Jan. 8, 1935., Cl H. wlLD 1,987,500

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ATTORNE?.

Patented Jan. 8, 1935 PATENT OFFICE y(mirroirsEALnm MaomNE Charles H. Wild, Baltimore, Md., assigner to Burt Machine Company, Incorporated, Baltimore,

a corporation of Maryland Application August 1,35, 1934, serial No. 739,959

43 Claims.

This invention has for its object an improved means in a carton-sealing apparatus for sealing a carton received in the machine with its bottom flaps closed unsealed; and it provides mechanism to permit the carton to be successively and automatically admitted to the operation thereupon of devices for unfolding the flaps, for folding the flaps back into closed position, and for subjecting the closed flap to pressure for a sufcient length of time for the adhesive to become set to a suflicient degree to permit the carton to be handled Without danger of opening.

The above sealing of a carton broadly is old, and is usually accomplished by unfolding the outer aps, applying an adhesive thereunto, refolding the same and pressing the re-folded aps onto the unpasted inner aps so that the same `may adhere thereto.

l An attempt has been made to `apply the adhesive to the inner flaps while the outer flaps are partially folded outward to permit the applying of the adhesive. It has been found dimcult to properly support the contents of the carton, and many obstacles have been encountered which prevented the practical operation of the efforts along this line.

The applicant has entirely overcome the dimculties as above set forth.

The usual way to support the contents of the vcarton is by means of the lower ap resting upon supports, the supports preventing the application of the adhesive to the flaps, thus necessitating the pasting of the outer out-turned flaps, and this is almost the universal custom. The applicant has also overcome this diiculty.

For certain classes of work, it is very desirable to paste both inner and outer aps so that the pasted surface of each may become adjacent and adhere when folded.

- ,Applicant has devised an improved means for causing a skip in the application of adhesive to the surface of a flap. He has devised means for adjusting the space of skip while the machine is in operation, and also means whereby the desired extent of the skip may be maintained and at a particular predetermined point with relation to the carton operated upon, whereby theskip may clear the contents or such parts of the carton as may be desirable.

A further object of this invention is the distinct 'segregation of the pasting and folding apparatus from the pressing and its feeding apparatus, providing an intermediate means for controlling the -transfer of the carton from the pasting-foldy fing-apparatus to the sealing apparatus for the (Cl. S13-6) purpose of .inspection and the removal of defective cartons.

A further object of this invention is the providing of improved means for sealing the flaps of point in the sealing ofthe carton, and means for adjusting said pressure to conform to the carton being operated upon.

In addition to the general broad scheme, the objects of this invention are further details of a novel character for carrying out the objects herein enumerated.

The adhesive-applying device of a plural character parallelly situated for applying adhesive to the inner naps, and also to the outer aps as may be desired, is broadly new, so far as applicant knows, the same not having been attempted in the art heretofore.

Novel features will be found in the adhesiveapplying device, in the sustaining devices for thecontents of the carton, for the control of the skip space of the surface upon which the adhesive is applied, the relative change of position of said space, the control of the admission and delivery of 'the cartons to the various ele ments, and many other details which will hereinafter appear.

With the foregoing and otherobjects in view, my invention consists of the novel construction, combination and arrangement of parts as hereinafter specifically described and illustrated in the accompanying drawings, wherein is shown the preferred embodiment of my invention, but it is understood that changes, variations and modifications can be resorted to which come within thev scope of the claims hereunto appended. f f

In the drawings of the herein-described embodiment of my invention, Figure 1 is a side view in elevation of my carton closing and sealing machine, illustrating the initial feeding mechanism thereof; Fig. 2 is a continuation of Fig. 1, illustrating the pasting portion of my machine, together with means for enabling the extracting of a carton from the lguideways .of the machine; this latter feature is particularly shown in Fig. 3, which is a continuation of Fig. 2, and

machine, which allows for the pressing down of the previously pasted and closed` flaps of the carton; Fig. 4 is a continuation of Fig. 3 of the delivery end of the machine, illustrating in side elevation the presser-roll structure as well as the variable speed drive for this section of the machine.

Fig. 5 is a fragmentary plan of the initial feed portion of the machine; Fig. 6 is a continuation of the `plan view shown in Fig. 5, illustrating means for delivering cartons in predetermined spaced relation to that section of the machine for initially opening the lower naps of the carton; Fig. 7 is a continuation of the plan view of the machine as illustrated in Fig. 6, disclosing a fragmentary portion of the lower flap-opening means together with the pasting mechanism for applying paste to the bottom naps of the carton. I will here call 'attention to the fact that the carton in its path through the machine in the feeding, opening, closing and pressing, is substantialLv on the same plane, thus preventing any undue displacement of the contents of the carton. r The view in Fig. 7 valso illustrates a fragmentaryportion of the means for initially closing the bottom flap members after the pasting of the flaps; Fig. 8 is a fragmentary plan view of that portion v,of the machine illustrating the means for finally closing the flaps of the carton and the delivery to the independent conveying means,'the full line in the drawings showing the top iiap closing means; Fig. 9 isa plan view of that portion of the machine shown in Fig. 8; Fig. 10 isV an enlarged fragmentary sectional view in elevation, taken through 10-10 of Fig. 7, looking in the direction ofthe arrows; Fig. 11 is a fragmentary plan view illustrating a presserroll means for increasing pressure towards the center portion of the carton, the same allowing for the application of increasing pressure to the top flaps of the cartons after the same have been pasted and closed; Fig. 12 is a fragmentary sectional view in elevation, taken on the line 12-12 of Fig. 11, looking in the direction of the arrows; Fig. 13 is a. fragmentary plan view similar to that shown in Fig. 11 of the drawings, illustrating a different type of presser-roll structure, whereby a greater variation of irregularity in the surface of the carton particularly towards the center may be compensated for; Fig. 14 is a side elevation of the appliance shown in Fig. 13; Fig. 15 is an enlarged sectional view in elevation, taken on line 15-15 of Fig. 13, looking in the direction of the arrows; Fig. 16 is a transverse sectional view in elevation, taken on the lines 16-16 of Fig. 7, looking in the direction of the arrows, and illustrating adjustable means for varying the position of the carton guideways and the carton-supporting grid structure; Fig. 17 is a fragmentary end view of the actuating mechanism for the carton spacing means, located near the feed end of the machine.

Fig. 18 is a view in elevation of the adjustable female cam member and its follower, which allows for controlling the timing of the operative and inoperative positions of the bottom pasting rollers in relation to the traverse of the carton; Fig. 19 is a sectional view taken on the line 19-19 of Fig. 18, looking in the direction of the arrows; Fig. 20 is a view in elevation of the adjustable male cam member and its follower, which has a function for operating the upper pasting rollers similar to that of the female cam member as shown in Fig. 18; Fig. 21 is a sectional view taken on the line 21-21 of Fig. 20, looking in the direction of the arrows.

Fig. 22 is a fragmentary front elevation of one of the adjustable roller mountings as used with the male and female cam members shown in Figs. 18 and 20; Fig. 23 is a plan view of the same;

Fig. 24 is a modlfled form of a female adjustable cam member, which allows for ready and convenient adjustment of the same as to the mechanical function of the pasting rollers during the operation of the machine, the function of this cam member being similar to that set out in describing Figures 18 to 20 of the drawings; Fig. 25 is a sectional view taken on the line 25-25 of Fig. 24, looking in the direction of the arrows.

Fig. 26 is a fragmentary elevation of the upper portion of a filled carton. the same being shown in relation to the upper pasting rolls during the simultaneous pasting operation of both the inner and outer carton flap members.

Fig'. 27 is a sectional view in elevation, taken through 2'1-27 of Fig. 10, having, however, av

filled carton in position between the pasting rolls and the outer flaps protected from the pasting rolls in the operation, whereby only the inner flaps are pasted, as may be desired, and particularly shows the guard members 46 for protecting the outer naps from receiving the paste. The better to understand this feature, the pasting of the outer and inner flap is illustrated in Fig. 28, the carton moving through the machine in the direction of the arrow. Fig. 29 is a View somewhat similar to that shown in Fig. 28, illustrating the protection of the outer flaps from being pasted, as more particularly illustrated inthe sectional view 27.

Fig. 30 is an enlarged view particularly showing the operation of the carton in passing the angular rollers 37, as illustrated in Fig. 5; this view also particularly shows how the end or apopener 43 enters between the ixmer and outer aps.

Referring to Fig. 6, which illustrates carrying roller 42, Fig. 31 is an enlarged view of this roller showing particularly its driving mechanism with reference to sha-ft 25, whereby this pulley is loose in one direction on said shaft and free to operate faster than the shaft in the other direction; Fig. 32 is an end view in elevation of the driving mechanism for roller 42, with the end or flange removed; Fig. 33 is a fragmentary plan view of the appliance shown in Fig. 10, particularly showing the paste roller, the paste disc and appliance for raising and lowering the same. Fig. 34 is an enlarged view of the pasting disc and its mountings with relation to the` paste-roller and its mountings, whereby a relatively fixed adjusted position may be maintained between said two rollers during the movement of the pasting disc into and out of pasting position.

Similar numerals refer to similar parts throughout the several views.

1 is the initial feed belt upon which is placed a carton upon entering the machine. This belt is preferably a plane conveyor belt without pusher members. 2 is a guide rail on one side of the machine, having a protruding member 3 to force the entering carton away from said guide rail 2 towards the opposite guide rail 4, which latter guide rail is provided with a projection 5 for the reception of a corner of the carton to stop and hold the same. 6 is a pusher member operated by 

